tweaks: fold a few pairs of regexes into each other

syntax/awk.nanorc

@@ -19,8 +19,7 @@ color green "(\{|\}|\(|\)|\;|\]|\[|\\|<|>|!|=|&|\+|-|\*|%|/|\?:|\^|\|)"
 color brightyellow "\<(for|if|while|do|else|in|delete|exit)\>"
 color brightyellow "\<(break|continue|return)\>"
 # I/O statements.
-color brightgreen "\<(close|getline|next|nextfile|print|printf)\>"
-color brightgreen "\<(system|fflush)\>"
+color brightgreen "\<(close|fflush|getline|next|nextfile|print|printf|system)\>"
 # Standard functions.
 color magenta "\<(atan2|cos|exp|int|log|rand|sin|sqrt|srand)\>"
 color magenta "\<(asort|asorti|gensub|gsub|index|length|match)\>"

syntax/cmake.nanorc

@@ -15,6 +15,5 @@ icolor brightred "^[[:space:]]*((end)?(function|macro)|return)"
 icolor cyan start="\$(\{|ENV\{)" end="\}"
 color magenta "\<(APPLE|UNIX|WIN32|CYGWIN|BORLAND|MINGW|MSVC(_IDE|60|71|80|90)?)\>"
 
-icolor brightblue "^([[:space:]]*)?#.*"
-icolor brightblue "[[:space:]]#.*"
+color brightblue "(^|[[:space:]])#.*"
 color ,green "[[:space:]]+$"

syntax/mgp.nanorc

@@ -5,6 +5,5 @@ header "^%include.*"
 comment "#"
 
 icolor green "^%[a-z].*"
-color cyan "(^|[[:space:]])#.*"
-color cyan "(^|[[:space:]])%%.*"
+color cyan "(^|[[:space:]])(#|%%).*"
 color ,green "[[:space:]]+$"

syntax/postgresql.nanorc

@@ -59,9 +59,8 @@ color green "'([^']|(\\'))*'" "%[qw]\{[^}]*\}" "%[qw]\([^)]*\)" "%[qw]<[^>]*>"
 color green "%[qw]\[[^]]*\]" "%[qw]\$[^$]*\$" "%[qw]\^[^^]*\^" "%[qw]![^!]*!"
 
 # Comments.
-color red "#[^{].*" "#$"
+color red "##?[^{].*" "##?$"
 color red "--[^{].*" "--$"
-color red "##[^{].*" "##$"
 color brightblue "//.*"
 color brightblue start="/\*" end="\*/"