Fixed typo

Signed-off-by: Federico Fissore <[email protected]>

Author: Federico Fissore

Diff for: src/arduino.cc/builder/constants/constants.go

@@ -210,7 +210,7 @@ const MSG_LIB_LEGACY = "(legacy)"
 const MSG_LIBRARIES_MULTIPLE_LIBS_FOUND_FOR = "Multiple libraries were found for \"{0}\""
 const MSG_LIBRARIES_NOT_USED = " Not used: {0}"
 const MSG_LIBRARIES_USED = " Used: {0}"
-const MSG_LIBRARY_CAN_USE_SRC_AND_UTILITY_FOLDERS = "Library can't use both 'src' and 'utility' folders. Double ckeck {0}"
+const MSG_LIBRARY_CAN_USE_SRC_AND_UTILITY_FOLDERS = "Library can't use both 'src' and 'utility' folders. Double check {0}"
 const MSG_LIBRARY_INCOMPATIBLE_ARCH = "WARNING: library {0} claims to run on {1} architecture(s) and may be incompatible with your current board which runs on {2} architecture(s)."
 const MSG_LOOKING_FOR_RECIPES = "Looking for recipes like {0}*{1}"
 const MSG_MISSING_BUILD_BOARD = "Board {0}:{1}:{2} doesn''t define a ''build.board'' preference. Auto-set to: {3}"