Fix RECIPEPREFIX regex

Author: drdv

makefile-doc.awk

@@ -843,7 +843,7 @@ function print_help() {
     printf "  PADDING (a padding character between anchors and docs): \"%s\"\n", PADDING
     printf "  DEPRECATED ([bool] show deprecated anchors): %s\n", DEPRECATED
     printf "  OFFSET (offset of docs from anchors): %s\n", OFFSET
-    printf "  RECIPEPREFIX: %s\n", RECIPEPREFIX
+    printf "  RECIPEPREFIX: |%s|\n", RECIPEPREFIX
     printf "  COLOR_: "
     printf "%sDEFAULT%s, ", COLOR_DEFAULT_CODE, COLOR_RESET_CODE
     printf "%sATTENTION%s, ", COLOR_ATTENTION_CODE, COLOR_RESET_CODE
@@ -872,7 +872,7 @@ BEGIN {
   initialize_variables_regex()
   initialize_colors()
 
-  RECIPEPREFIX = RECIPEPREFIX == 0 ? "^\t" : RECIPEPREFIX
+  RECIPEPREFIX = RECIPEPREFIX == 0 ? "^\t" : "^"RECIPEPREFIX
 
   VARIABLES_REGEX = VARIABLES_REGEX == "" ? VARIABLES_REGEX_DEFAULT : VARIABLES_REGEX
 

test/integration/test-help

@@ -3,13 +3,13 @@ Usage: awk [-v option=value] -f makefile-doc.awk [Makefile ...]
 Description: Generate docs for Makefile variables and targets
 Options:
   OUTPUT_FORMAT: ANSI
-  EXPORT_THEME (theme for HTML/LATEX output):
-  SUB (substitutions):
+  EXPORT_THEME (theme for HTML/LATEX output): 
+  SUB (substitutions): 
   TARGETS_REGEX (regex for matching targets): ^ *[^#][ ,a-zA-Z0-9$_/%.(){}-]* *&?(:|::)([^=:]|$)( *|.*;)
   VARIABLES_REGEX (regex for matching variables): ^ *( *(override|unexport|export|private) *)* *[^#][a-zA-Z0-9_-]* *(=|:=|::=|:::=|!=|\?=|\+=)
   VARS ([bool] show documented variables): 1
   PADDING (a padding character between anchors and docs): " "
   DEPRECATED ([bool] show deprecated anchors): 1
   OFFSET (offset of docs from anchors): 2
-  RECIPEPREFIX: ^
+  RECIPEPREFIX: |^	|
   COLOR_: DEFAULT, ATTENTION, DEPRECATED, SECTION, WARNING, BACKTICKS