ADDITIONAL SYSTEM INFORMATION :
System locale: fr_FR

A DESCRIPTION OF THE PROBLEM :
Similar to JDK-8204584 "jdeps generates illegal dot file containing ranksep=0,600000", but for the "rankSep" attribute, which was made configurable by JDK-8274311.

jdeps should format double with no localization:

```
diff --git a/src/jdk.jdeps/share/classes/com/sun/tools/jdeps/ModuleDotGraph.java b/src/jdk.jdeps/share/classes/com/sun/tools/jdeps/ModuleDotGraph.java
index a23f25be9d2a..41616aab5dee 100644
--- a/src/jdk.jdeps/share/classes/com/sun/tools/jdeps/ModuleDotGraph.java
+++ b/src/jdk.jdeps/share/classes/com/sun/tools/jdeps/ModuleDotGraph.java
@@ -353,7 +353,7 @@ public void build(Path filename) throws IOException {
                  PrintWriter out = new PrintWriter(writer)) {
 
                 out.format("digraph \"%s\" {%n", name);
- out.format(" nodesep=%f;%n", attributes.nodeSep());
+ out.format((Locale)null, " nodesep=%f;%n", attributes.nodeSep());
                 out.format((Locale)null, " ranksep=%f;%n", attributes.rankSep());
                 out.format(" pencolor=transparent;%n");
                 out.format(" node [shape=plaintext, fontcolor=\"%s\", fontname=\"%s\","
```


CUSTOMER SUBMITTED WORKAROUND :
Run jdeps with an English locale, e.g. on Linux: "LANG=C jdeps ..."

FREQUENCY : always