Not all leading tab characters in diagnostic messages are replaced with spaces

The error diagnostics that are used by default do not replace ALL leading tab characters with a single space.

As one would expect from seeing this code line in souce code: https://github.com/microsoft/TypeScript/blob/85ef91e2233fa384e980005c109fadc04376ce3e/src/compiler/program.ts#L410

This line only replaces the first leading tab character. Which causes way too much leading whitespace printed in the logs when errors occur during tsc build.

TypeScript Version: 4.0.3

Search Terms: tabs diagnostics, reporter, formatCodeSpan, formatDiagnosticsWithColorAndContext, leading tabs,

Expected behavior: Source code has four leading tabs for indentation.

[line number] [gutter seperator] [space] [space] [space] [space] [line content]

Actual behavior: [line number] [gutter seperator] [space] [tab] [tab] [tab] [line content]

PR I can submit a PR for this that would change this line: lineContent = lineContent.replace("\t", " "); // convert tabs to single spaces to: lineContent = lineContent.replace(/\t/gy, " "); // convert all leading tabs to single spaces