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Respect the -P flag.

--- a/minipeg.c

+++ b/minipeg.c

@@ -27,7 +27,7 @@

 #include <string.h>

 #include <unistd.h>

 #line 0 "version.h"

-#define MINIPEG_VERSION "f0adf43"

+#define MINIPEG_VERSION "4e9111b"

 #line 0 "tree.h"

 enum { Unknown= 0, Rule, Variable, Name, Dot, Character, String, Class, Action, Inline, Predicate, Error, Alternate, Sequence, PeekFor, PeekNot, Query, Star, Plus };

@@ -2793,8 +2793,11 @@

   Rule_compile_c_header();

-  for (; headers;  headers= headers->next)

-    fprintf(output, "#line %i \"%s\"\n%s\n", headers->line, fileName, headers->text);

+  for (; headers;  headers= headers->next) {

+    if (!nolinesFlag)

+      fprintf(output, "#line %i \"%s\"\n", headers->line, fileName);

+    fprintf(output, "%s\n", headers->text);

+  }

   if (rules)

     Rule_compile_c(rules, nolinesFlag);

--- a/peg.peg

+++ b/peg.peg

@@ -282,8 +282,11 @@

   Rule_compile_c_header();

-  for (; headers;  headers= headers->next)

-    fprintf(output, "#line %i \"%s\"\n%s\n", headers->line, fileName, headers->text);

+  for (; headers;  headers= headers->next) {

+    if (!nolinesFlag)

+      fprintf(output, "#line %i \"%s\"\n", headers->line, fileName);

+    fprintf(output, "%s\n", headers->text);

+  }

   if (rules)

     Rule_compile_c(rules, nolinesFlag);