Move usage text into usage_str var

For consistency and readability.

Note: This also makes exactly one extra blank line be printed at the end
of every usage text, which is currently only done in the following
files:

* src/fcopy/main.c
* src/fnettrace-dns/main.c
* src/fnettrace-icmp/main.c
* src/fnettrace-sni/main.c
* src/fnettrace/main.c
* src/profstats/main.c

1 files changed, 9 insertions, 8 deletions

diff --git a/src/fcopy/main.c b/src/fcopy/main.c
index ce2efb295..a56e8a91b 100644
--- a/src/fcopy/main.c
+++ b/src/fcopy/main.c
@@ -416,18 +416,19 @@ static void duplicate_link(const char *src, const char *dest, struct stat *s) {
         free(rdest);
 }
 
+static const char *const usage_str =
+        "Usage: fcopy [--follow-link] src dest\n"
+        "\n"
+        "Copy SRC to DEST/SRC. SRC may be a file, directory, or symbolic link.\n"
+        "If SRC is a directory it is copied recursively.  If it is a symlink,\n"
+        "the link itself is duplicated, unless --follow-link is given,\n"
+        "in which case the destination of the link is copied.\n"
+        "DEST must already exist and must be a directory.\n";
 
 static void usage(void) {
-        fputs("Usage: fcopy [--follow-link] src dest\n"
-                "\n"
-                "Copy SRC to DEST/SRC. SRC may be a file, directory, or symbolic link.\n"
-                "If SRC is a directory it is copied recursively.  If it is a symlink,\n"
-                "the link itself is duplicated, unless --follow-link is given,\n"
-                "in which case the destination of the link is copied.\n"
-                "DEST must already exist and must be a directory.\n", stderr);
+        fputs(usage_str, stderr);
 }
 
-
 int main(int argc, char **argv) {
 #if 0
         {