More misc. typos

found via `codespell-q 3`
please review

12 files changed, 21 insertions, 21 deletions

diff --git a/contrib/conftest/pngcp.dfa b/contrib/conftest/pngcp.dfa
index 15a856e2f..acf200d32 100644
--- a/contrib/conftest/pngcp.dfa
+++ b/contrib/conftest/pngcp.dfa
@@ -33,7 +33,7 @@ option WRITE_16BIT on
 option WRITE_FILTER on
 
 # pngcp needs this to preserve unknown chunks, switching all these on means that
-# pngcp can work without explicit known chunk reading suppport
+# pngcp can work without explicit known chunk reading support
 option UNKNOWN_CHUNKS on
 option SET_UNKNOWN_CHUNKS on
 option HANDLE_AS_UNKNOWN on
diff --git a/contrib/libtests/pngstest.c b/contrib/libtests/pngstest.c
index e0e82ef40..e7e03e809 100644
--- a/contrib/libtests/pngstest.c
+++ b/contrib/libtests/pngstest.c
@@ -2036,7 +2036,7 @@ typedef struct
    /* Precalculated values: */
    int          in_opaque;   /* Value of input alpha that is opaque */
    int          is_palette;  /* Sample values come from the palette */
-   int          accumulate;  /* Accumlate component errors (don't log) */
+   int          accumulate;  /* Accumulate component errors (don't log) */
    int          output_8bit; /* Output is 8-bit (else 16-bit) */
 
    void (*in_gp)(Pixel*, png_const_voidp);
diff --git a/contrib/libtests/pngunknown.c b/contrib/libtests/pngunknown.c
index 12eab7258..d9cc4488b 100644
--- a/contrib/libtests/pngunknown.c
+++ b/contrib/libtests/pngunknown.c
@@ -85,7 +85,7 @@ typedef png_byte *png_const_bytep;
 #define PNG_WRITE_16BIT_SUPPORTED
 #define PNG_READ_16BIT_SUPPORTED
 
-/* This comes from pnglibconf.h afer 1.5: */
+/* This comes from pnglibconf.h after 1.5: */
 #define PNG_FP_1 100000
 #define PNG_GAMMA_THRESHOLD_FIXED\
    ((png_fixed_point)(PNG_GAMMA_THRESHOLD * PNG_FP_1))
diff --git a/contrib/libtests/pngvalid.c b/contrib/libtests/pngvalid.c
index f7dc1a39e..3fdc002a9 100644
--- a/contrib/libtests/pngvalid.c
+++ b/contrib/libtests/pngvalid.c
@@ -102,7 +102,7 @@ typedef png_byte *png_const_bytep;
 #define PNG_WRITE_16BIT_SUPPORTED
 #define PNG_READ_16BIT_SUPPORTED
 
-/* This comes from pnglibconf.h afer 1.5: */
+/* This comes from pnglibconf.h after 1.5: */
 #define PNG_FP_1 100000
 #define PNG_GAMMA_THRESHOLD_FIXED\
    ((png_fixed_point)(PNG_GAMMA_THRESHOLD * PNG_FP_1))
@@ -5270,7 +5270,7 @@ standard_info_part1(standard_display *dp, png_structp pp, png_infop pi)
     */
    standard_palette_validate(dp, pp, pi);
 
-   /* In any case always check for a tranparent color (notice that the
+   /* In any case always check for a transparent color (notice that the
     * colour type 3 case must not give a successful return on the get_tRNS call
     * with these arguments!)
     */
@@ -6780,7 +6780,7 @@ transform_image_validate(transform_display *dp, png_const_structp pp,
    store_image_check(dp->this.ps, pp, 0);
 
    /* Read the palette corresponding to the output if the output colour type
-    * indicates a palette, othewise set out_palette to garbage.
+    * indicates a palette, otherwise set out_palette to garbage.
     */
    if (out_ct == PNG_COLOR_TYPE_PALETTE)
    {
@@ -7991,7 +7991,7 @@ image_transform_png_set_rgb_to_gray_mod(const image_transform *this,
          /* Now calculate the actual gray values.  Although the error in the
           * coefficients depends on whether they were specified on the command
           * line (in which case truncation to 15 bits happened) or not (rounding
-          * was used) the maxium error in an individual coefficient is always
+          * was used) the maximum error in an individual coefficient is always
           * 2/32768, because even in the rounding case the requirement that
           * coefficients add up to 32768 can cause a larger rounding error.
           *
@@ -8207,7 +8207,7 @@ image_transform_png_set_rgb_to_gray_mod(const image_transform *this,
       that->bluef = that->greenf = that->redf = gray;
       that->bluee = that->greene = that->rede = err;
 
-      /* The sBIT is the minium of the three colour channel sBITs. */
+      /* The sBIT is the minimum of the three colour channel sBITs. */
       if (that->red_sBIT > that->green_sBIT)
          that->red_sBIT = that->green_sBIT;
       if (that->red_sBIT > that->blue_sBIT)
diff --git a/contrib/pngminus/png2pnm.bat b/contrib/pngminus/png2pnm.bat
index 449cf3675..a2798c340 100755
--- a/contrib/pngminus/png2pnm.bat
+++ b/contrib/pngminus/png2pnm.bat
@@ -7,7 +7,7 @@ png2pnm.exe -noraw ..\pngsuite\basn0g16.png basn0g16.pgm
 REM -- full-color
 png2pnm.exe -noraw ..\pngsuite\basn2c08.png basn2c08.ppm
 png2pnm.exe -noraw ..\pngsuite\basn2c16.png basn2c16.ppm
-REM -- palletted
+REM -- paletted
 png2pnm.exe -noraw ..\pngsuite\basn3p01.png basn3p01.ppm
 png2pnm.exe -noraw ..\pngsuite\basn3p02.png basn3p02.ppm
 png2pnm.exe -noraw ..\pngsuite\basn3p04.png basn3p04.ppm
@@ -27,7 +27,7 @@ png2pnm.exe -raw ..\pngsuite\basn0g16.png rawn0g16.pgm
 REM -- full-color
 png2pnm.exe -raw ..\pngsuite\basn2c08.png rawn2c08.ppm
 png2pnm.exe -raw ..\pngsuite\basn2c16.png rawn2c16.ppm
-REM -- palletted
+REM -- paletted
 png2pnm.exe -raw ..\pngsuite\basn3p01.png rawn3p01.ppm
 png2pnm.exe -raw ..\pngsuite\basn3p02.png rawn3p02.ppm
 png2pnm.exe -raw ..\pngsuite\basn3p04.png rawn3p04.ppm
diff --git a/contrib/pngminus/png2pnm.sh b/contrib/pngminus/png2pnm.sh
index b1c05370d..756126a53 100755
--- a/contrib/pngminus/png2pnm.sh
+++ b/contrib/pngminus/png2pnm.sh
@@ -8,7 +8,7 @@
 # -- full-color
 ./png2pnm -noraw ../pngsuite/basn2c08.png basn2c08.ppm
 ./png2pnm -noraw ../pngsuite/basn2c16.png basn2c16.ppm
-# -- palletted
+# -- paletted
 ./png2pnm -noraw ../pngsuite/basn3p01.png basn3p01.ppm
 ./png2pnm -noraw ../pngsuite/basn3p02.png basn3p02.ppm
 ./png2pnm -noraw ../pngsuite/basn3p04.png basn3p04.ppm
@@ -28,7 +28,7 @@
 # -- full-color
 ./png2pnm -raw ../pngsuite/basn2c08.png rawn2c08.ppm
 ./png2pnm -raw ../pngsuite/basn2c16.png rawn2c16.ppm
-# -- palletted
+# -- paletted
 ./png2pnm -raw ../pngsuite/basn3p01.png rawn3p01.ppm
 ./png2pnm -raw ../pngsuite/basn3p02.png rawn3p02.ppm
 ./png2pnm -raw ../pngsuite/basn3p04.png rawn3p04.ppm
diff --git a/contrib/pngminus/pnm2png.bat b/contrib/pngminus/pnm2png.bat
index f756cb84d..c02b80bec 100755
--- a/contrib/pngminus/pnm2png.bat
+++ b/contrib/pngminus/pnm2png.bat
@@ -7,7 +7,7 @@ pnm2png.exe basn0g16.pgm basn0g16.png
 REM -- full-color
 pnm2png.exe basn2c08.ppm basn2c08.png
 pnm2png.exe basn2c16.ppm basn2c16.png
-REM -- palletted
+REM -- paletted
 pnm2png.exe basn3p01.ppm basn3p01.png
 pnm2png.exe basn3p02.ppm basn3p02.png
 pnm2png.exe basn3p04.ppm basn3p04.png
@@ -27,7 +27,7 @@ pnm2png.exe rawn0g16.pgm rawn0g16.png
 REM -- full-color
 pnm2png.exe rawn2c08.ppm rawn2c08.png
 pnm2png.exe rawn2c16.ppm rawn2c16.png
-REM -- palletted
+REM -- paletted
 pnm2png.exe rawn3p01.ppm rawn3p01.png
 pnm2png.exe rawn3p02.ppm rawn3p02.png
 pnm2png.exe rawn3p04.ppm rawn3p04.png
diff --git a/contrib/pngminus/pnm2png.sh b/contrib/pngminus/pnm2png.sh
index d79df2fae..2ad17a608 100755
--- a/contrib/pngminus/pnm2png.sh
+++ b/contrib/pngminus/pnm2png.sh
@@ -8,7 +8,7 @@
 # -- full-color
 ./pnm2png basn2c08.ppm basn2c08.png
 ./pnm2png basn2c16.ppm basn2c16.png
-# -- palletted
+# -- paletted
 ./pnm2png basn3p01.ppm basn3p01.png
 ./pnm2png basn3p02.ppm basn3p02.png
 ./pnm2png basn3p04.ppm basn3p04.png
@@ -28,7 +28,7 @@
 # -- full-color
 ./pnm2png rawn2c08.ppm rawn2c08.png
 ./pnm2png rawn2c16.ppm rawn2c16.png
-# -- palletted
+# -- paletted
 ./pnm2png rawn3p01.ppm rawn3p01.png
 ./pnm2png rawn3p02.ppm rawn3p02.png
 ./pnm2png rawn3p04.ppm rawn3p04.png
diff --git a/contrib/testpngs/makepngs.sh b/contrib/testpngs/makepngs.sh
index 059503e23..eb1c15fc9 100755
--- a/contrib/testpngs/makepngs.sh
+++ b/contrib/testpngs/makepngs.sh
@@ -74,7 +74,7 @@ case "$1" in
    --coverage)
       # Comments below indicate cases known to be required and not duplicated
       # in other (required) cases; the aim is to get a minimal set that gives
-      # the maxium code coverage.
+      # the maximum code coverage.
       mpg none gray-alpha 8 # required: code coverage, sRGB opaque component
       mpg none palette 8 # required: basic palette read
       mpg 1.8 gray 2 # required: tests gamma threshold code
diff --git a/contrib/tools/chkfmt b/contrib/tools/chkfmt
index a1b88ccbf..95181fde2 100755
--- a/contrib/tools/chkfmt
+++ b/contrib/tools/chkfmt
@@ -54,7 +54,7 @@ doed(){
 }
 
 # In beta versions the version string which appears in files can be a little
-# long and cause spuriously overlong lines.  To avoid this subtitute the version
+# long and cause spuriously overlong lines.  To avoid this substitute the version
 # string with a 'standard' version a.b.cc before checking for long lines.
 if test -r png.h
 then
diff --git a/contrib/tools/pngcp.c b/contrib/tools/pngcp.c
index 5f304e30f..2f6ea65d2 100644
--- a/contrib/tools/pngcp.c
+++ b/contrib/tools/pngcp.c
@@ -191,7 +191,7 @@ vl_strategy[] =
    /* This controls the order of search. */
    { "huffman", Z_HUFFMAN_ONLY },
    { "RLE", Z_RLE },
-   { "fixed", Z_FIXED }, /* the remainder do window searchs */
+   { "fixed", Z_FIXED }, /* the remainder do window searches */
    { "filtered", Z_FILTERED },
    { "default", Z_DEFAULT_STRATEGY },
    { all, 0 }
@@ -336,7 +336,7 @@ static const option options[] =
 #  define VLC(name) VLCIDAT(name) VLCiCCP(name) VLCzTXt(name)
 
 #  ifdef PNG_SW_COMPRESS_png_level
-      /* The libpng compression level isn't searched beause it justs sets the
+      /* The libpng compression level isn't searched because it justs sets the
        * other things that are searched!
        */
       VLO("compression", compression, 0)
diff --git a/contrib/tools/pngfix.c b/contrib/tools/pngfix.c
index e6403dc48..f494230d8 100644
--- a/contrib/tools/pngfix.c
+++ b/contrib/tools/pngfix.c
@@ -2363,7 +2363,7 @@ zlib_advance(struct zlib *zlib, png_uint_32 nbytes)
       flush = Z_NO_FLUSH;
       out_bytes = 0;
 
-      /* NOTE: expression 3 is only evaluted on 'continue', because of the
+      /* NOTE: expression 3 is only evaluated on 'continue', because of the
        * 'break' at the end of this loop below.
        */
       for (;endrc == ZLIB_OK;