bring back fixes

Author: silviuaavram

packages/mui-material/src/FilledInput/FilledInput.js

@@ -124,7 +124,7 @@ const FilledInputRoot = styled(InputBaseRoot, {
               }`,
               left: 0,
               bottom: 0,
-              content: '"\\00a0"',
+              content: '""',
               position: 'absolute',
               right: 0,
               transition: theme.transitions.create('border-bottom-color', {

packages/mui-material/src/Input/Input.js

@@ -98,7 +98,7 @@ const InputRoot = styled(InputBaseRoot, {
               borderBottom: `1px solid ${bottomLineColor}`,
               left: 0,
               bottom: 0,
-              content: '"\\00a0"',
+              content: '""',
               position: 'absolute',
               right: 0,
               transition: theme.transitions.create('border-bottom-color', {