samba_abi.py: avoid inefficient string concatenations

Signed-off-by: Bjoern Jacke <bjacke@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

diff --git a/buildtools/wafsamba/samba_abi.py b/buildtools/wafsamba/samba_abi.py
index 5e7686da3d68b1ebcd842b8a319a5997fa9cf600..bf82fc5fe1fc806c1996e179a2682ca769109bb0 100644 (file)
--- a/buildtools/wafsamba/samba_abi.py
+++ b/buildtools/wafsamba/samba_abi.py
@@ -72,9 +72,7 @@ def parse_sigs(sigs, abi_match):
 
 def save_sigs(sig_file, parsed_sigs):
     '''save ABI signatures to a file'''
-    sigs = ''
-    for s in sorted(parsed_sigs.keys()):
-        sigs += '%s: %s\n' % (s, parsed_sigs[s])
+    sigs = "".join('%s: %s\n' % (s, parsed_sigs[s]) for s in sorted(parsed_sigs.keys()))
     return samba_utils.save_file(sig_file, sigs, create_dir=True)