I got too large spacing between words in Word. What may be wrong in the case?
I tried this and it did not help.
There is nothing “wrong”; the program is behaving as designed. Your paragraph format is set to justified, and you have very little text before the URI, which Word will not break by default unless it contains a space or a hyphen. Set the paragraph justification to left for this paragraph, and the space will be closed up, leaving a short line before the URI.
Alternatively, insert a “hard return” (shift-enter) right before the URI, and that will collapse the space as above.
A good way to fix the look of such lines without changing justification is to insert Zero Width Space character(s) inside the very long word/expression (usually hyperlinks). Put this character after slashes (or in other places) and the link will be nicely divided.
This is a better solution than using Shift+Enter because if you copy such line (for example to Notepad) this will still be single, not divided line.
To insert Zero Width Space go to Insert tab, click Symbol, click More Symbols, type: 200B in Character code field and click Insert. From this dialog box you can also assign a keyboard shortcut for this character to make things faster.
Open a Word file whose character spacing you know is correct. In File > Options > Advanced > Layout Options for [filename], jot down what is checked and unchecked. Then, go to your problem file and make sure that the same items are checked and unchecked. For me, it was "Balance SBCS characters and DBCS characters" causing the extra spacing. The problem arose because I downloaded files from the Internet as rtf's, then saved as docx.
Other possible settings are shown at: How to remove extra spacing between words in Word 2010?