[RFC PATCH 18/21] usage.c: move rename variables in usage routines around

["Ævar Arnfjörð Bjarmason" <avarab@gmail.com>]

A renaming-only change to rename variables in the usage routines to be
consistent. Before we'd use "params", now we use "ap", and the mixture
of "fmt", "err", "warn" etc. is replaced with just "fmt".

This change make a subsequent non-refactoring commit's diff smaller
and easier to understand.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
 usage.c | 88 ++++++++++++++++++++++++++++-----------------------------
 1 file changed, 44 insertions(+), 44 deletions(-)

diff --git a/usage.c b/usage.c
index 28005106f10..4b93744137d 100644
--- a/usage.c
+++ b/usage.c
@@ -178,38 +178,38 @@ static const char *fmt_with_err(char *buf, int n, const char *fmt)
 	return buf;
 }
 
-void NORETURN usage(const char *err)
+void NORETURN usage(const char *fmt)
 {
-	usagef("%s", err);
+	usagef("%s", fmt);
 }
 
-void NORETURN usagef(const char *err, ...)
+void NORETURN usagef(const char *fmt, ...)
 {
-	va_list params;
+	va_list ap;
 
-	va_start(params, err);
-	usage_routine(err, params);
-	va_end(params);
+	va_start(ap, fmt);
+	usage_routine(fmt, ap);
+	va_end(ap);
 }
 
-void NORETURN die(const char *err, ...)
+void NORETURN die(const char *fmt, ...)
 {
-	va_list params;
+	va_list ap;
 
 	if (die_is_recursing()) {
 		fputs("fatal: recursion detected in die handler\n", stderr);
 		exit(128);
 	}
 
-	va_start(params, err);
-	die_routine(err, params);
-	va_end(params);
+	va_start(ap, fmt);
+	die_routine(fmt, ap);
+	va_end(ap);
 }
 
 void NORETURN die_errno(const char *fmt, ...)
 {
 	char buf[1024];
-	va_list params;
+	va_list ap;
 
 	if (die_is_recursing()) {
 		fputs("fatal: recursion detected in die_errno handler\n",
@@ -217,19 +217,19 @@ void NORETURN die_errno(const char *fmt, ...)
 		exit(128);
 	}
 
-	va_start(params, fmt);
-	die_routine(fmt_with_err(buf, sizeof(buf), fmt), params);
-	va_end(params);
+	va_start(ap, fmt);
+	die_routine(fmt_with_err(buf, sizeof(buf), fmt), ap);
+	va_end(ap);
 }
 
 #undef die_message
-int die_message(const char *err, ...)
+int die_message(const char *fmt, ...)
 {
-	va_list params;
+	va_list ap;
 
-	va_start(params, err);
-	die_message_routine(err, params);
-	va_end(params);
+	va_start(ap, fmt);
+	die_message_routine(fmt, ap);
+	va_end(ap);
 	return 128;
 }
 
@@ -237,22 +237,22 @@ int die_message(const char *err, ...)
 int die_message_errno(const char *fmt, ...)
 {
 	char buf[1024];
-	va_list params;
+	va_list ap;
 
-	va_start(params, fmt);
-	die_message_routine(fmt_with_err(buf, sizeof(buf), fmt), params);
-	va_end(params);
+	va_start(ap, fmt);
+	die_message_routine(fmt_with_err(buf, sizeof(buf), fmt), ap);
+	va_end(ap);
 	return -1;
 }
 
 #undef error
-int error(const char *err, ...)
+int error(const char *fmt, ...)
 {
-	va_list params;
+	va_list ap;
 
-	va_start(params, err);
-	error_routine(err, params);
-	va_end(params);
+	va_start(ap, fmt);
+	error_routine(fmt, ap);
+	va_end(ap);
 	return -1;
 }
 
@@ -260,31 +260,31 @@ int error(const char *err, ...)
 int error_errno(const char *fmt, ...)
 {
 	char buf[1024];
-	va_list params;
+	va_list ap;
 
-	va_start(params, fmt);
-	error_routine(fmt_with_err(buf, sizeof(buf), fmt), params);
-	va_end(params);
+	va_start(ap, fmt);
+	error_routine(fmt_with_err(buf, sizeof(buf), fmt), ap);
+	va_end(ap);
 	return -1;
 }
 
-void warning(const char *warn, ...)
+void warning(const char *fmt, ...)
 {
-	va_list params;
+	va_list ap;
 
-	va_start(params, warn);
-	warning_routine(warn, params);
-	va_end(params);
+	va_start(ap, fmt);
+	warning_routine(fmt, ap);
+	va_end(ap);
 }
 
-void warning_errno(const char *warn, ...)
+void warning_errno(const char *fmt, ...)
 {
 	char buf[1024];
-	va_list params;
+	va_list ap;
 
-	va_start(params, warn);
-	warning_routine(fmt_with_err(buf, sizeof(buf), warn), params);
-	va_end(params);
+	va_start(ap, fmt);
+	warning_routine(fmt_with_err(buf, sizeof(buf), fmt), ap);
+	va_end(ap);
 }
 
 /* Only set this, ever, from t/helper/, when verifying that bugs are caught. */
-- 
2.34.0.rc2.809.g11e21d44b24