Update docs

Author: jormundur00

substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/SubstrateOptions.java

@@ -913,7 +913,7 @@ public static long getTearDownFailureNanos() {
     @Option(help = "file:doc-files/NeverInlineHelp.txt", type = OptionType.Debug)//
     public static final HostedOptionKey<AccumulatingLocatableMultiOptionValue.Strings> NeverInline = new HostedOptionKey<>(AccumulatingLocatableMultiOptionValue.Strings.build());
 
-    @Option(help = "Never trivially inline provided methods. Uses the same method pattern syntax as the 'NeverInline' option.")//
+    @Option(help = "file:doc-files/NeverInlineTrivialHelp.txt")//
     public static final HostedOptionKey<AccumulatingLocatableMultiOptionValue.Strings> NeverInlineTrivial = new HostedOptionKey<>(AccumulatingLocatableMultiOptionValue.Strings.build());
 
     @Option(help = "Maximum number of nodes in a method so that it is considered trivial.")//

substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/doc-files/NeverInlineTrivialHelp.txt

@@ -0,0 +1,40 @@
+Pattern for disabling trivial inlining of methods during image generation.
+The syntax for a pattern is:
+
+  SourcePatterns = SourcePattern ["," SourcePatterns] .
+  SourcePattern = [ Class "." ] method [ "(" [ Parameter { ";" Parameter } ] ")" ] .
+  Parameter = Class | "int" | "long" | "float" | "double" | "short" | "char" | "boolean" .
+  Class = { package "." } class .
+
+Glob pattern matching (*, ?) is allowed in all parts of the source pattern.
+
+Examples of method filters:
+---------
+  visit(Argument;BlockScope)
+
+  Matches all methods named "visit", with the first parameter of
+  type "Argument", and the second parameter of type "BlockScope".
+  The packages of the parameter types are irrelevant.
+---------
+  arraycopy(Object;;;;)
+
+  Matches all methods named "arraycopy", with the first parameter
+  of type "Object", and four more parameters of any type. The
+  packages of the parameter types are irrelevant.
+---------
+  jdk.graal.compiler.core.graph.PostOrderNodeIterator.*
+
+  Matches all methods in the class "jdk.graal.compiler.core.graph.PostOrderNodeIterator".
+---------
+  *
+
+  Matches all methods in all classes
+---------
+  jdk.graal.compiler.core.graph.*.visit
+
+  Matches all methods named "visit" in classes in the package
+  "jdk.graal.compiler.core.graph".
+---------
+  arraycopy,toString
+
+  Matches all methods named "arraycopy" or "toString", meaning that ',' acts as an or operator.