[xref-helper] Inline displayProperty fixer broken when line contains multiple xref links

[gewarren]

The light bulb displayProperty fixer changes the last xref link in the following sentence, not the one where the cursor is:

<xref:Microsoft.AspNetCore.HttpOverrides.IPNetwork> and <xref:Microsoft.AspNetCore.Builder.ForwardedHeadersOptions.KnownNetworks?displayProperty=nameWithType> have been marked as obsolete in favor of using <xref:System.Net.IPNetwork> and <xref:Microsoft.AspNetCore.Builder.ForwardedHeadersOptions.KnownIPNetworks?displayProperty=nameWithType>.

Worse, if the last xref doesn't have a displayProperty parameter (as in the following sentence) and you use the light bulb to change the displayProperty, everything after the second-last xref is deleted:

These have been marked as obsolete in favor of using <xref:System.Net.IPNetwork?displayProperty=fullName> and <xref:Microsoft.AspNetCore.Builder.ForwardedHeadersOptions.KnownIPNetworks>.