chore: rename docs files with dash connected (#177)

Author: stevenhua0320

docs/examples/data/Ag_nyquist_qmax30.gr docs/examples/data/Ag-nyquist-qmax30.grdocs/examples/data/Ag_nyquist_qmax30.gr renamed to docs/examples/data/Ag-nyquist-qmax30.gr

@@ -19,9 +19,9 @@
 parameters, running peak extraction, and saving the results.
 
 This script is equivalent to running
-srmise data/Ag_nyquist_qmax30.gr --range 2. 3.5 \
-    --baseline "Polynomial(degree=1)" --save output/extract_single_peak.srmise \
-    --pwa output/extract_single_peak.pwa --plot
+srmise data/Ag-nyquist-qmax30.gr --range 2. 3.5 \
+    --baseline "Polynomial(degree=1)" --save output/extract-single-peak.srmise \
+    --pwa output/extract-single-peak.pwa --plot
 at the command line.
 """
 
@@ -39,7 +39,7 @@ def run(plot=True):
     ppe = PDFPeakExtraction()
 
     # Load the PDF from a file
-    ppe.loadpdf("data/Ag_nyquist_qmax30.gr")
+    ppe.loadpdf("data/Ag-nyquist-qmax30.gr")
 
     # Set up extraction parameters.
     # For convenience, we add all parameters to a dictionary before passing them
@@ -74,8 +74,8 @@ def run(plot=True):
     # half-maximum), and area of extracted peaks.  The reported values
     # are for Gaussians in the radial distribution function (RDF) corresponding
     # to this PDF.
-    ppe.write("output/extract_single_peak.srmise")
-    ppe.writepwa("output/extract_single_peak.pwa")
+    ppe.write("output/extract-single-peak.srmise")
+    ppe.writepwa("output/extract-single-peak.pwa")
 
     # Plot results.
     # Display plot of extracted peak. It is also possible to plot an existing

docs/examples/data/C60_fine_qmax21.gr docs/examples/data/C60-fine-qmax21.grdocs/examples/data/C60_fine_qmax21.gr renamed to docs/examples/data/C60-fine-qmax21.gr

@@ -34,7 +34,7 @@ def run(plot=True):
 
     # Initialize peak extraction
     ppe = PDFPeakExtraction()
-    ppe.loadpdf("data/C60_fine_qmax21.gr")
+    ppe.loadpdf("data/C60-fine-qmax21.gr")
 
     # Set up interpolated baseline.
     # The FromSequence baseline creates an interpolated baseline from provided
@@ -98,8 +98,8 @@ def run(plot=True):
     ppe.fit()
 
     # Save results
-    ppe.write("output/fit_initial.srmise")
-    ppe.writepwa("output/fit_initial.pwa")
+    ppe.write("output/fit-initial.srmise")
+    ppe.writepwa("output/fit-initial.pwa")
 
     if plot:
         plt.figure()