question: public Span trim ( CharSequence src ) { if ( start < end ) while ( src . charAt ( end - 1 ) == 32 ) { end -- ; if ( start == end ) break ; } if ( start < end ) while ( src . charAt ( start ) == 32 ) { start ++ ; if ( start == end ) break ; } return this ; }
target:  Returns the Span, with leading and trailing whitespaces omitted.