Fix typos

build/single_file_libs/combine.py

@@ -41,7 +41,7 @@ destn: TextIO = sys.stdout
 # Set of file Path objects previously inlined (and to ignore if reencountering).
 found: Set[Path] = set()
 
-# Compiled regex Patern to handle "#pragma once" in various formats:
+# Compiled regex Pattern to handle "#pragma once" in various formats:
 # 
 #   #pragma once
 #     #pragma once
@@ -53,7 +53,7 @@ found: Set[Path] = set()
 # 
 pragma_regex: Pattern = re.compile(r'^\s*#\s*pragma\s*once\s*')
 
-# Compiled regex Patern to handle the following type of file includes:
+# Compiled regex Pattern to handle the following type of file includes:
 # 
 #   #include "file"
 #     #include "file"