code: 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;
  	}
docs: Returns the Span, with leading and trailing whitespaces omitted.