#1955 Tests fail on windows

[Alex]

SVN revision 15163.
On Windows, the default charset is not UTF-8, so the following tests fail.
To reproduce the problem, add -Dfile.encoding=WINDOWS-1252 to jvm args when running tests.

[ERROR] HtmlScript2Test.incorrectCharset [Chrome](com.gargoylesoftware.htmlunit.html.HtmlScript2Test)  Time elapsed: 0.01 s  <<< ERROR!
org.openqa.selenium.WebDriverException: 
com.gargoylesoftware.htmlunit.ScriptException: illegal character (http://localhost:12345/second/#1)
Build info: version: '3.9.1', revision: '63f7b50', time: '2018-02-07T22:25:02.294Z'
System info: host: 'ALEX-PC', ip: '192.168.56.1', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_162'
Driver info: driver.version: HtmlUnitDriver
Caused by: com.gargoylesoftware.htmlunit.ScriptException: illegal character (http://localhost:12345/second/#1)
Caused by: net.sourceforge.htmlunit.corejs.javascript.EvaluatorException: illegal character (http://localhost:12345/second/#1)

[ERROR] HtmlScript2Test.incorrectCharset [FF45](com.gargoylesoftware.htmlunit.html.HtmlScript2Test)  Time elapsed: 0.008 s  <<< ERROR!
org.openqa.selenium.WebDriverException: 
com.gargoylesoftware.htmlunit.ScriptException: illegal character (http://localhost:12345/second/#1)
Build info: version: '3.9.1', revision: '63f7b50', time: '2018-02-07T22:25:02.294Z'
System info: host: 'ALEX-PC', ip: '192.168.56.1', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_162'
Driver info: driver.version: HtmlUnitDriver
Caused by: com.gargoylesoftware.htmlunit.ScriptException: illegal character (http://localhost:12345/second/#1)
Caused by: net.sourceforge.htmlunit.corejs.javascript.EvaluatorException: illegal character (http://localhost:12345/second/#1)

[ERROR] HtmlScript2Test.incorrectCharset [FF52](com.gargoylesoftware.htmlunit.html.HtmlScript2Test)  Time elapsed: 0.008 s  <<< ERROR!
org.openqa.selenium.WebDriverException: 
com.gargoylesoftware.htmlunit.ScriptException: illegal character (http://localhost:12345/second/#1)
Build info: version: '3.9.1', revision: '63f7b50', time: '2018-02-07T22:25:02.294Z'
System info: host: 'ALEX-PC', ip: '192.168.56.1', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_162'
Driver info: driver.version: HtmlUnitDriver
Caused by: com.gargoylesoftware.htmlunit.ScriptException: illegal character (http://localhost:12345/second/#1)
Caused by: net.sourceforge.htmlunit.corejs.javascript.EvaluatorException: illegal character (http://localhost:12345/second/#1)

[ERROR] HtmlScript2Test.incorrectCharset [IE](com.gargoylesoftware.htmlunit.html.HtmlScript2Test)  Time elapsed: 0.008 s  <<< ERROR!
org.openqa.selenium.WebDriverException: 
com.gargoylesoftware.htmlunit.ScriptException: illegal character (http://localhost:12345/second/#1)
Build info: version: '3.9.1', revision: '63f7b50', time: '2018-02-07T22:25:02.294Z'
System info: host: 'ALEX-PC', ip: '192.168.56.1', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_162'
Driver info: driver.version: HtmlUnitDriver
Caused by: com.gargoylesoftware.htmlunit.ScriptException: illegal character (http://localhost:12345/second/#1)
Caused by: net.sourceforge.htmlunit.corejs.javascript.EvaluatorException: illegal character (http://localhost:12345/second/#1)

[ERROR] Tests run: 64, Failures: 0, Errors: 4, Skipped: 0, Time elapsed: 0.402 s <<< FAILURE! - in com.gargoylesoftware.htmlunit.xml.XmlPageTest
[ERROR] XmlPageTest.bom [Chrome](com.gargoylesoftware.htmlunit.xml.XmlPageTest)  Time elapsed: 0 s  <<< ERROR!
java.lang.NullPointerException
    at com.gargoylesoftware.htmlunit.xml.XmlPageTest.asText(XmlPageTest.java:117)
    at com.gargoylesoftware.htmlunit.xml.XmlPageTest.bom(XmlPageTest.java:393)

[ERROR] XmlPageTest.bom [FF45](com.gargoylesoftware.htmlunit.xml.XmlPageTest)  Time elapsed: 0.002 s  <<< ERROR!
java.lang.NullPointerException
    at com.gargoylesoftware.htmlunit.xml.XmlPageTest.asText(XmlPageTest.java:117)
    at com.gargoylesoftware.htmlunit.xml.XmlPageTest.bom(XmlPageTest.java:393)

[ERROR] XmlPageTest.bom [FF52](com.gargoylesoftware.htmlunit.xml.XmlPageTest)  Time elapsed: 0 s  <<< ERROR!
java.lang.NullPointerException
    at com.gargoylesoftware.htmlunit.xml.XmlPageTest.asText(XmlPageTest.java:117)
    at com.gargoylesoftware.htmlunit.xml.XmlPageTest.bom(XmlPageTest.java:393)

[ERROR] XmlPageTest.bom [IE](com.gargoylesoftware.htmlunit.xml.XmlPageTest)  Time elapsed: 0.006 s  <<< ERROR!
java.lang.NullPointerException
    at com.gargoylesoftware.htmlunit.xml.XmlPageTest.asText(XmlPageTest.java:117)
    at com.gargoylesoftware.htmlunit.xml.XmlPageTest.bom(XmlPageTest.java:393)

[Alex]

Same for HtmlUnit-CssParser project, CSS3ParserTest.java, method unicodeInputByteStreamDefaultEncoding