Fix python format.

Author: rorth

compiler-rt/test/lit.common.cfg.py

@@ -165,14 +165,22 @@ def push_dynamic_library_lookup_path(config, new_path):
 # tests on 64-bit hosts and vice versa. Adjust config.compiler_rt_libdir
 # accordingly.
 if config.enable_per_target_runtime_dir:
-    if config.target_arch == 'i386':
-        config.compiler_rt_libdir = re.sub(r'/x86_64(?=-[^/]+$)', '/i386', config.compiler_rt_libdir)
-    elif config.target_arch == 'x86_64':
-        config.compiler_rt_libdir = re.sub(r'/i386(?=-[^/]+$)', '/x86_64', config.compiler_rt_libdir)
-    if config.target_arch == 'sparc':
-        config.compiler_rt_libdir = re.sub(r'/sparcv9(?=-[^/]+$)', '/sparc', config.compiler_rt_libdir)
-    elif config.target_arch == 'sparcv9':
-        config.compiler_rt_libdir = re.sub(r'/sparc(?=-[^/]+$)', '/sparcv9', config.compiler_rt_libdir)
+    if config.target_arch == "i386":
+        config.compiler_rt_libdir = re.sub(
+            r"/x86_64(?=-[^/]+$)", "/i386", config.compiler_rt_libdir
+        )
+    elif config.target_arch == "x86_64":
+        config.compiler_rt_libdir = re.sub(
+            r"/i386(?=-[^/]+$)", "/x86_64", config.compiler_rt_libdir
+        )
+    if config.target_arch == "sparc":
+        config.compiler_rt_libdir = re.sub(
+            r"/sparcv9(?=-[^/]+$)", "/sparc", config.compiler_rt_libdir
+        )
+    elif config.target_arch == "sparcv9":
+        config.compiler_rt_libdir = re.sub(
+            r"/sparc(?=-[^/]+$)", "/sparcv9", config.compiler_rt_libdir
+        )
 
 # Check if the test compiler resource dir matches the local build directory
 # (which happens with -DLLVM_ENABLE_PROJECTS=clang;compiler-rt) or if we are