fix html display float/strings

Author: saldanhad

pandas/core/frame.py

@@ -1192,14 +1192,15 @@ def _repr_html_(self) -> str | None:
             min_rows = get_option("display.min_rows")
             max_cols = get_option("display.max_columns")
             show_dimensions = get_option("display.show_dimensions")
+            show_floats = get_option("display.float_format")
 
             formatter = fmt.DataFrameFormatter(
                 self,
                 columns=None,
                 col_space=None,
                 na_rep="NaN",
                 formatters=None,
-                float_format=None,
+                float_format=show_floats,
                 sparsify=None,
                 justify=None,
                 index_names=True,

pandas/io/formats/html.py

@@ -190,7 +190,7 @@ def _write_cell(
 
         if self.escape:
             # escape & first to prevent double escaping of &
-            esc = {"&": r"&amp;", "<": r"&lt;", ">": r"&gt;"}
+            esc = {"&": r"&amp;", "<": r"&lt;", ">": r"&gt;"," ":"&nbsp;"}
         else:
             esc = {}
 

pandas/tests/frame/test_info_repr_html.py

@@ -0,0 +1,32 @@
+import pytest
+import pandas as pd
+
+
+class Testfloatformat:
+    @pytest.mark.parametrize("data, format_option, expected_values", [
+        ({"A": [12345.6789]}, "{:12.3f}", "   12345.679"),
+        ({"A": [None]}, "{:.3f}", " None"),
+        ({"A": [""]}, "{:.2f}", " "),
+        ({"A": [112345.6789]}, "{:6.3f}", "112345.679"),
+        ({"A": ["foo    foo"]}, None, " foo    foo"),
+        ({"A": [None]}, None, " None"),
+        ({"A": ["foo foo foo"]}, None, " foo foo foo"),
+    ]) #test cases
+
+    def test_float_formatting_html_output(self,data,format_option, expected_values):
+            # set float format, avoid for string checks
+            if format_option is not None:
+                 pd.set_option("display.float_format", format_option.format)
+            
+            # crate dataframe
+            df = pd.DataFrame(data)
+                              
+            # capture html output
+            html_output = df._repr_html_()
+
+            # check
+            assert expected_values in html_output
+
+            # reset option
+            if format_option is not None:
+                 pd.reset_option("display.float_format")