Add the const qualifier to "char *" variables that refer to literal strings. (#4370)
diff --git a/Objects/complexobject.c b/Objects/complexobject.c
index 3bf37ee..4bcf2ce 100644
--- a/Objects/complexobject.c
+++ b/Objects/complexobject.c
@@ -363,9 +363,9 @@
/* These do not need to be freed. re is either an alias
for pre or a pointer to a constant. lead and tail
are pointers to constants. */
- char *re = NULL;
- char *lead = "";
- char *tail = "";
+ const char *re = NULL;
+ const char *lead = "";
+ const char *tail = "";
if (v->cval.real == 0. && copysign(1.0, v->cval.real)==1.0) {
/* Real part is +0: just output the imaginary part and do not