minor: fix error message and wrongly joined/blackified strings

xdist/looponfail.py

@@ -32,7 +32,7 @@ def pytest_cmdline_main(config):
     if config.getoption("looponfail"):
         usepdb = config.getoption("usepdb")  # a core option
         if usepdb:
-            raise pytest.UsageError("--pdb incompatible with --looponfail.")
+            raise pytest.UsageError("--pdb is incompatible with --looponfail.")
         looponfail_main(config)
         return 2  # looponfail only can get stop with ctrl-C anyway
 

xdist/plugin.py

@@ -126,12 +126,12 @@ def pytest_addoption(parser):
     )
     parser.addini(
         "rsyncdirs",
-        "list of (relative) paths to be rsynced for" " remote distributed testing.",
+        "list of (relative) paths to be rsynced for remote distributed testing.",
         type="pathlist",
     )
     parser.addini(
         "rsyncignore",
-        "list of (relative) glob-style paths to be ignored " "for rsyncing.",
+        "list of (relative) glob-style paths to be ignored for rsyncing.",
         type="pathlist",
     )
     parser.addini(

xdist/scheduler/loadscope.py

@@ -187,7 +187,7 @@ class LoadScopeScheduling(object):
             break
         else:
             raise RuntimeError(
-                "Unable to identify crashitem on a workload with " "pending items"
+                "Unable to identify crashitem on a workload with pending items"
             )
 
         # Made uncompleted work unit available again