Fixed some typos, courtesy of codespell

src/libstrongswan/utils/enum.h

@@ -53,7 +53,7 @@ typedef struct enum_name_t enum_name_t;
  * The ENUM and the ENUM_END define a enum_name_t pointer with the name supplied
  * in "name".
  *
- * Resolving of enum names is done using a printf hook. A printf fromat
+ * Resolving of enum names is done using a printf hook. A printf format
  * character %N is replaced by the enum string. Printf needs two arguments to
  * resolve a %N, the enum_name_t* (the defined name in ENUM_BEGIN) followed
  * by the numerical enum value.