De-DOS line-endings (rapidsai#14880)

These are the only two files in the repo (other than the sphinx make.bat files, which should have DOS line-endings) that use \r\n as the line-ending. Let's fix that.

Authors:
  - Lawrence Mitchell (https://github.com/wence-)

Approvers:
  - David Wendt (https://github.com/davidwendt)
  - Nghia Truong (https://github.com/ttnghia)

URL: rapidsai#14880

cpp/doxygen/unicode.md

@@ -1,23 +1,23 @@
-# Unicode Limitations
-
-The strings column currently supports only UTF-8 characters internally.
-For functions that require character testing (e.g. cudf::strings::all_characters_of_type()) or
-case conversion (e.g. cudf::strings::capitalize(), etc) only the 16-bit [Unicode 13.0](http://www.unicode.org/versions/Unicode13.0.0)
-character code-points (0-65535) values are supported.
-Case conversion and character testing on characters above code-point 65535 are not supported.
-
-Case conversions that are context-sensitive are not supported. Also, case conversions that result
-in multiple characters are not reversible. That is, adjacent individual characters will not be case converted
-to a single character. For example, converting character ß to upper case will result in the characters "SS". But converting "SS" to lower case will produce "ss".
-
-Strings case and type APIs:
-
-- cudf::strings::all_characters_of_type()
-- cudf::strings::to_upper()
-- cudf::strings::to_lower()
-- cudf::strings::capitalize()
-- cudf::strings::title()
-- cudf::strings::swapcase()
-
-Also, using regex patterns that use the shorthand character classes `\d \D \w \W \s \S` will include only appropriate characters with
-code-points between (0-65535).
+# Unicode Limitations
+
+The strings column currently supports only UTF-8 characters internally.
+For functions that require character testing (e.g. cudf::strings::all_characters_of_type()) or
+case conversion (e.g. cudf::strings::capitalize(), etc) only the 16-bit [Unicode 13.0](http://www.unicode.org/versions/Unicode13.0.0)
+character code-points (0-65535) values are supported.
+Case conversion and character testing on characters above code-point 65535 are not supported.
+
+Case conversions that are context-sensitive are not supported. Also, case conversions that result
+in multiple characters are not reversible. That is, adjacent individual characters will not be case converted
+to a single character. For example, converting character ß to upper case will result in the characters "SS". But converting "SS" to lower case will produce "ss".
+
+Strings case and type APIs:
+
+- cudf::strings::all_characters_of_type()
+- cudf::strings::to_upper()
+- cudf::strings::to_lower()
+- cudf::strings::capitalize()
+- cudf::strings::title()
+- cudf::strings::swapcase()
+
+Also, using regex patterns that use the shorthand character classes `\d \D \w \W \s \S` will include only appropriate characters with
+code-points between (0-65535).