What effect does the leading `-` have? ``` makefile clean: -rm index.html -rm build.html ``` https://github.com/openopensource/openopensource.github.io/blob/72bb17680908eb3b5fe7e6f6280abbecab0f5cb9/Makefile#L16-L18
What effect does the leading
-have?clean: -rm index.html -rm build.htmlopenopensource.github.io/Makefile
Lines 16 to 18 in 72bb176