CLN: convert ValueError messages from #GH-26583 to formatted str

Author: nathalier

pandas/_libs/tslibs/strptime.pyx

@@ -139,14 +139,14 @@ def array_strptime(object[:] values, object fmt,
                 if is_coerce:
                     iresult[i] = NPY_NAT
                     continue
-                raise ValueError("time data %r does not match "
-                                 "format %r (match)" % (val, fmt))
+                raise ValueError("time data {} does not match "
+                                 "format {} (match)".format(val, fmt))
             if len(val) != found.end():
                 if is_coerce:
                     iresult[i] = NPY_NAT
                     continue
-                raise ValueError("unconverted data remains: %s" %
-                                 val[found.end():])
+                raise ValueError("unconverted data remains: {}"
+                                 .format(val[found.end():]))
 
         # search
         else:
@@ -155,8 +155,8 @@ def array_strptime(object[:] values, object fmt,
                 if is_coerce:
                     iresult[i] = NPY_NAT
                     continue
-                raise ValueError("time data %r does not match format "
-                                 "%r (search)" % (val, fmt))
+                raise ValueError("time data {} does not match "
+                                 "format {} (search)".format(val, fmt))
 
         iso_year = -1
         year = 1900