Crash on multiline strings

[tkafka]

When parsing a multiline string like this

	add_header X-Content-Security-Policy "default-src 'self'; \
	script-src 'self' https://ssl.google-analytics.com; \
	img-src 'self' https://ssl.google-analytics.com";

nginxbeautifier crashes with a following error:

/opt/homebrew/lib/node_modules/nginxbeautifier/nginxbeautifier.js:142
        return input.match(catchRegex)[1];
                                      ^

TypeError: Cannot read property '1' of null
    at extractTextBySeperator (/opt/homebrew/lib/node_modules/nginxbeautifier/nginxbeautifier.js:142:39)
    at extractAllPossibleText (/opt/homebrew/lib/node_modules/nginxbeautifier/nginxbeautifier.js:164:29)
    at strip_line (/opt/homebrew/lib/node_modules/nginxbeautifier/nginxbeautifier.js:193:35)
    at Object.clean_lines (/opt/homebrew/lib/node_modules/nginxbeautifier/nginxbeautifier.js:217:49)
    at Object.<anonymous> (/opt/homebrew/lib/node_modules/nginxbeautifier/index.js:235:38)
    at Module._compile (node:internal/modules/cjs/loader:1092:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1121:10)
    at Module.load (node:internal/modules/cjs/loader:972:32)
    at Function.Module._load (node:internal/modules/cjs/loader:813:14)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:76:12)

The workaround is to concatenate the string onto a long line:

	add_header X-Content-Security-Policy "default-src 'self'; script-src 'self' https://ssl.google-analytics.com;  img-src 'self' https://ssl.google-analytics.com";