Add a switch to force coverpoint expansion

Signed-off-by: Rafal Kapuscik <rkapuscik@antmicro.com>

verilog/formatting/format_style.h

diff --git a/verilog/formatting/format_style.h b/verilog/formatting/format_style.h
index 495caa6..f230a06 100644
--- a/verilog/formatting/format_style.h
+++ b/verilog/formatting/format_style.h
@@ -95,6 +95,7 @@
   // attempt to do line wrap optimization.  By doing nothing in those cases, we
   // reduce the risk of harming already decent code.
   bool try_wrap_long_lines = true;
+  bool expand_coverpoints = true;
 
   // Compact binary expressions inside indexing / bit selection operators
   bool compact_indexing_and_selections = true;

verilog/tools/formatter/verilog_format.cc

diff --git a/verilog/tools/formatter/verilog_format.cc b/verilog/tools/formatter/verilog_format.cc
index b43a1b3..7032b53 100644
--- a/verilog/tools/formatter/verilog_format.cc
+++ b/verilog/tools/formatter/verilog_format.cc
@@ -166,6 +166,9 @@
           AlignmentPolicy::kInferUserIntent,
           "Format various assignments: {align,flush-left,preserve,infer}");
 
+ABSL_FLAG(bool, expand_coverpoints, false,
+          "If true, always expand coverpoints.");
+
 ABSL_FLAG(bool, try_wrap_long_lines, false,
           "If true, let the formatter attempt to optimize line wrapping "
           "decisions where wrapping is needed, else leave them unformatted.  "
@@ -224,6 +227,7 @@
 
     // formatting style flags
     format_style.try_wrap_long_lines = absl::GetFlag(FLAGS_try_wrap_long_lines);
+    format_style.expand_coverpoints = absl::GetFlag(FLAGS_expand_coverpoints);
 
     // various indentation control
     format_style.port_declarations_indentation =