Before this commit, when a file ended with a newline, the syntax error message would show an extra line after the file. For example, the error message would look like this: ``` [aaron@tc-lan-adapter ~/g/ruby (master)]$ echo "foo(" > test.rb [aaron@tc-lan-adapter ~/g/ruby (master)]$ od -c test.rb 0000000 f o o ( \n 0000005 [aaron@tc-lan-adapter ~/g/ruby (master)]$ wc -l test.rb 1 test.rb [aaron@tc-lan-adapter ~/g/ruby (master)]$ ./miniruby test.rb test.rb: test.rb:1: syntax error found (SyntaxError) > 1 | foo( | ^ unexpected end-of-input; expected a `)` to close the arguments 2 | ``` This commit fixes the "end of line" book keeping when printing an error so that there is no extra line output at the end of the file: ``` [aaron@tc-lan-adapter ~/g/ruby (fix-last-line-error)]$ echo "foo(" | ./miniruby -: -:1: syntax error found (SyntaxError) > 1 | foo( | ^ unexpected end-of-input; expected a `)` to close the arguments [aaron@tc-lan-adapter ~/g/ruby (fix-last-line-error)]$ echo -n "foo(" | ./miniruby -: -:1: syntax error found (SyntaxError) > 1 | foo( | ^ unexpected end-of-input; expected a `)` to close the arguments ``` Notice that in the above example, the error message only displays one line regardless of whether or not the file ended with a newline. [Bug #20918] [ruby-core:120035]